Properly refer to ioctl(2)

From Caspar Schutijser, thanks.

Document SIOCDELLABEL, link among MPLS drivers

Use of the IOCTL section losely adopted from bridge(4),
the list of ioctls however is still incomplete.

mpw(4) and mpip(4) could use a reference to mpe(4) IOCTL or so,
but this is good enough for starters.

Feedback OK claudio

Adjust references for sysctl(3) to sysctl(2)

be clear about MPLS spelling it out explicitly the first time
we use this term.

ok jmc@

use .Mt for email addresses; from Jan Stary <hans at stare dot cz>; ok jmc@

.Xr mpe and ldpd for interested parties. ok deraadt

there is no mpls(4) man page;

an mpe interface, not "a";

SEE ALSO is sorted primarily by section number;

There will never be a mpls(8) but mpls(4) will be soon here.

OK claudio@

tweak previous;

Document the new mpe interface and explain the appropriate commands
in ifconfig(8). The man pages reference mpls(8) which doesn't exist,
but claudio promises it will follow shortly.
a thumb up and ok from claudio@

Document SIOCDELLABEL, link among MPLS drivers

Use of the IOCTL section losely adopted from bridge(4),
the list of ioctls however is still incomplete.

mpw(4) and mpip(4) could use a reference to mpe(4) IOCTL or so,
but this is good enough for starters.

Feedback OK claudio

Adjust references for sysctl(3) to sysctl(2)

be clear about MPLS spelling it out explicitly the first time
we use this term.

ok jmc@

use .Mt for email addresses; from Jan Stary <hans at stare dot cz>; ok jmc@

.Xr mpe and ldpd for interested parties. ok deraadt

there is no mpls(4) man page;

an mpe interface, not "a";

SEE ALSO is sorted primarily by section number;

There will never be a mpls(8) but mpls(4) will be soon here.

OK claudio@

tweak previous;

Document the new mpe interface and explain the appropriate commands
in ifconfig(8). The man pages reference mpls(8) which doesn't exist,
but claudio promises it will follow shortly.
a thumb up and ok from claudio@

Adjust references for sysctl(3) to sysctl(2)

be clear about MPLS spelling it out explicitly the first time
we use this term.

ok jmc@

use .Mt for email addresses; from Jan Stary <hans at stare dot cz>; ok jmc@

.Xr mpe and ldpd for interested parties. ok deraadt

there is no mpls(4) man page;

an mpe interface, not "a";

SEE ALSO is sorted primarily by section number;

There will never be a mpls(8) but mpls(4) will be soon here.

OK claudio@

tweak previous;

Document the new mpe interface and explain the appropriate commands
in ifconfig(8). The man pages reference mpls(8) which doesn't exist,
but claudio promises it will follow shortly.
a thumb up and ok from claudio@